Analysis of Elastic, Doubly Symmetric, Horizontally Curved Beams during Lifting

作者：Plaut Raymond H^*; Moen Cristopher D

来源：Journal of Structural Engineering, 2013, 139(1): 39-46.

DOI：10.1061/(ASCE)ST.1943-541X.0000612

• Curved beams
• Lifting
• Suspended structures
• Closed-form solutions
• Lateral stability
• Elastic analysis
• Horizontally curved beams
• Imperfect beams
• Bridge construction
• Torsion

The lifting of horizontally curved beams (or almost-straight beams with an imperfection in shape) is considered, with application in the construction of bridges. Acircularly curved beam that is suspended at two symmetric locations by vertical or inclined cables is analyzed. The cross section of the beam is assumed to be doubly symmetric, the material is assumed to be linearly elastic, the cross-sectional dimensions are assumed to be small relative to the radius of curvature, and the deformations are assumed to be small. Both uniform (St. Venant) torsion and inclusion of nonuniform (warping) torsion are treated. Analytical equations are derived for the overall roll angle of the beam, the internal forces and moments, the weak-axis and strong-axis deflections, and the cross-sectional angle of twist. The behavior depends crucially on the locations of the lift points. DOI: 10.1061/(ASCE)ST.1943-541X.0000612.

• 出版日期2013-1